Adding UDP proxying for steam stats.
Revert "Adding UDP proxying for steam stats."

This reverts commit 199e9aea624f427ce61d0c1b6820490f92fcbaf7.
Revert "Merge remote-tracking branch 'origin/development' into development"

This reverts commit b79af0d323084cc18af62fef8d8bbcc8446efbc5, reversing
changes made to 199e9aea624f427ce61d0c1b6820490f92fcbaf7.
Revert "Revert "Adding UDP proxying for steam stats.""

This reverts commit d0ad2fce52dcd0891ce6b29bac0b563a0d227821.
Merge branch 'plugin_manager_rewrite' into development
Fixed a lot of old imports, removed core plugins.
Added friendlier error messages to most commands. Fixed some old plugin behavior with the new plugin manager.
Added a server connect timeout and a trace logger that should prove useful.
Somehow I forgot to add the old core-plugins into the new folder in git.
Nor should those incomplete plugins have been included.
Added /list_players and /delete_player to the player manager. Updated all plugins to correctly use the new plugin manager, and updated the plugin_settings column to use a mutable json dictionary and storage to reflect that fact. It is now a property.
Version 1.2.1:

* Plugin state is now saved; MOTD settings in existing plugins will have to be deleted and replaced after first run.

 * Starbound configuration manager assures that the settings for the server are correct before running. It can be disabled.

 * Added /list_players and /delete_player commands. Supports wildcards.

  * Unicode MOTD support.

 Errata:

 Reformatted a bunch of files.
 Restructured plugin storage.
Updating config.json.default.
Merge remote-tracking branch 'upstream/development' into development